Knoxville Weather Forecast

    • 68
    • 78

    Chance Thunderstorms

    • 66
    • 85

    Rain Showers Likely

    • 58
    • 75

    Rain Showers Likely

    • 53
    • 66

    Rain Showers Likely

    • 49
    • 64

    Mostly Cloudy

    • 52
    • 68

    Partly Sunny

    • 54
    • 69

    Partly Sunny

Today 18 Sep Knox

Partly cloudy. Lows in the mid 50s. Highs in the lower 70s.

Tonight 18 Sep Knox

Partly cloudy this Evening, then mostly cloudy with a chance of Showers and Thunderstorms after midnight. Patchy fog after midnight. Lows in the upper 60s. Southeast Winds 5 to 10 Mph with Gusts up to 20 Mph. Chance of rain 40 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Knoxville Temperature Statistics

September Temperature

Galesburg Municipal Airport (7.5 miles)

  • Lowest 14 September, 2026

    52.3 °F

  • Average September

    73.7 °F

  • Highest 3 September, 2026

    93.6 °F

Climate (2021–2026)

Galesburg Municipal Airport (7.5 miles)

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  • Average Low 2021–2026

    41.9 °F

  • Average 2021–2026

    52.2 °F

  • Average High 2021–2026

    62.5 °F
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